Drop the wall wrecker first, followed by the baby dragon, barbarian king and archer queen to narrow the base, the barbarian king will narrow the path by taking down some of what's around the base so when you drop your electro the dragon won't scatter it.
Second, when the king narrows everything around the base, drop the electro dragons and drop your freeze spells so the defense doesn't melt your electro dragons, then have your 8 balloons follow the electro dragons. This is a proven technique, try it out and let me know what you think.
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